Gas burner and method of making the same



y 12, 1932- o.' w. ANDERSON ET AL ,867,526

GAS BURNER AND METHOD OF MAKING THE SAME Filed Jan. 2, 1951 Patented July 12, 1932 UNITED STATES, PATENT oral-ca OSCAR W. ANDERSON AND EDWARD E. FORBESTER, OF DENVER, COLORADO GAS BURNER AND METHOD OF MAKING THE-SAME I Application filed January 2, 1931. Serial No. 506,078.

This invention relates to improvements in methods and apparatus for adjusting gas burners, of the type employed in domestic cooking appliances.

In many parts of our country, natural gas has been substituted for artificial gas and due to the different properties of these two gases, it is necessary to make certain changes in the gas burners for the purpose of obtaining successful operation in connection with natural gas.

The burners of the ordinary gas stoves are provided with adjustable orifices by means of which the amount of gas admitted into each burner can be varied to some extent, but the adjustment afiorded by the burners designed for use with artificial gas is not suflicient to adapt them for use with natural gas and 1t has therefore been necessary to discard the orifice caps and to replace them with others having much smaller discharge openings.

' Owing to the fact that stoves have burners of different sizes and to the further'fact that there often exists a slight variation in pres,- sure, depending on the distance from the gasometers, a standard orifice is not satisfactory for every location and for every burner, and

, it is therefore necessary in many cases to enlarge the orifices so as to obtain the proper gas flow.

It is the object. of this invention to provide a method of adjusting gas burners that shall make it possible to employ the old orifice cap and at the same time permit the orifice to be adjusted to the exact size necessary for the most successful operation of the burner.

Another object of this invention is to produce an adapter of a specific construction that can be employed for adapting the old orifice ,caps and which shall be so designed that the opening can readily be enlarged soas to get the best possible operation of the burner with which the adapter is associated. Another object of this invention is to produce an article of manufacture comprising an orifice cap and an adapter assembled so as to get the proper adjustment of the burner in connection with natural gas.

The above and other objects that may become apparent as this descriptionproceeds Fig. 2 is a diametrical section through an 00 orifice cap before the latter is reamed;

Fig. 3 is a section showing the manner in" which the adapter is secured to the'orifice cap; and

Fig. 4 is a diametrical section of the improved adapter.

In the drawing numeral- 1 designates the gas pipe that extends from the control valve to the burner of a gas stove. The end of pipe 1 is threaded as indicated by reference numeral 2 and has secured to it an orifice cap 3. This cap has a threaded opening and is attached to the pipe in the manner shown. One end of the cap is closed and provided with an orifice 4 and the other end has a hexagonal flange 5 by means of which the cap is rotated on the pipe. In changing a gas stove from artificial to natural gas, the orifice cap 3 is removed and the opening 4 enlarged by means of a r'eamer 6 to a predetermined diameter. After the opening 4 has been enlarged an adapter like that shown in Fig. 4 is inserted into the opening. This adapter consists of a cylindrical section 7, one end'of which has a spherical head'8 of 35 somewhat larger diameter. A shoulder 9 is formed at the inner end of the head where it connects with the cylindrical portion. The diameter of the cylindrical portion 7 is the same as .the diameter of the reamer 6 so that the adapter will fit the hole in the orifice ca with. a snug fit. The adapter is provided with an axial opening. That portion of the opening lying within the cylindrical part has been designated by reference numeral 10.

and has a comparatively large diameter,

After the opening 4 has been reamed to the er for use in modifying the orifice cap of an proper size, the adapter is put into place as shown in Fig. 3, and the cap and adapter are then supported on an anvil 13, one side of which has a depression 14 of the proper size to fit the convex head. The other side of the anvil has an opening 15 of a diameter slightly larger than the diameter of the head, and these two openings are connected by an opening 16 of smaller diameter. After the cap and adapter have been put in place on the anvil, a fianging tool 17 is inserted into the cap. One end of this tool has a projection with concave side walls that extends into the opening 10 in the adapter and when the upper end of the flanging tool is struck by a hammer, the end of the cylindrical part 7 will be flanged outwardly into the osition shown in Fig. 1, and the adapter wi 1 therefore be securely fastened to the orifice cap so that the two parts form an integral assembly. After the adapter has been put in place, the orifice cap is now attached to the pipe and the gas turned on and if the opening 11 is not large enough to admit the amount of gas necessary for the best operation of the burner, it is enlarged by means of a reamer constructed like the one indi-' cated by reference numeral -6 a set of tools of this type, preferably includes three reamers of different sizes, so that very fine adjustments can be effected.

By referring to Fig. 1, it will be seen that after the adapter has been put into place and flanged outwardly, the inner wall of part 7' forms a frusto-conical surface that directs the gas into the opening in the adapter, thereby reducing the resistance and producing what may be termed a venturi effect.

By spreading the open end of the adapter,

the necessity of threading the opening in the nipple which greatly reduces the time required to make the alteration.

From the above description it will be seen that by means of the apparatus shown and described, it is possible to take an ordinary orifice cap, ream the orifice to a predetermined size insert an adapter like that shown in Fig. 4, fiange the inner end of the adapter so that the two parts assume the position shown in Fig. 1 and then ream the opening in 11 to the proper size to suit the actual conditions prevailing where the burner is used.

If, for any reason, an adapter is spoiled, as, for example,if the opening 11 is made too large, the adapter can readily be removed by reversing the anvil and applying a punch to the inner end of the adapter so as to force it out of the orifice in cap Another adaptor can then be inserted and properly adjusted. Y

Having described the invention what is claimed as new is:

1. As an article of manufacture, an adaptartificial gas burner so as to adapt it for use with natural gas, comprising a member having a cylindrical portion provided at one end with a head of larger diameter than the cylindrical portion, the head terminating at one end in an annular shoulder, the cylindrical portion having a cylindrical opening extending inwardly from its end, which cylindrical opening being slightly less in diameter than the outside diameter of the cylindrical por tion provides a thin wall that can be flan ged outwardly at its free end, and said head having a cylindrical opening of a smaller diameter to provide an orifice for controlling the fiow of gas extending theret-hrough and communicating with the aforesaid cylindrical opening.

2. As an article of manufacture, an adapt-v er for use in modifying the orifice cap of an artificial gas burner so as'to adapt it for use with natural gas, comprising a member hav ing a smooth cylindrical portion provided ,at one end with a head of larger diameter than the cylindrical portion, the head terminating at one end in an annular-shoulder,

the cylindrical portion having a cylindrical opening extending inwardly from its end, the cylindrical opening being slightly less in diameter than the outside diameter of the cylindrical portion whereby a thin wall is formed that can be flanged outwardly, the inner end of the cylindrical opening terminating in a section that tapers inwardly and in turn terminates in a short cylindrical opening of the proper diameter for controlling the fiow of the gas.

3. A two-part orifice cap comprising thecombination with a cylindrical cap member having a concentric cylindrical threaded opening extending inwardly from one end and the other end being provided with an opening of smaller diameter and concentric with said threaded opening, of an adapter located in the smaller opening of said cap, said adapter having a cylin rical portion whose outer surface is smooth and whose diameter is such that it will enter the said opening in the end wall of the cylindrical cap member with a snug fit, the outer end of the adapter having a head of larger diameter than its cylindrical portion, an annular radial'wall at the inner end of the head forming a shoulder adapted to fit against the outer surface of the'end wall of the cylindrical cap, the adapter'having an opening extending therethrough, the inner end of the opening being sightly smaller in diameter than said cylindrical portion, thereby leavinga thin cylindrical wall, the inner end of which cylindrical wall is expanded and flanged outwardy tosecure the adapter to the cylindrical cap, the outer end of theopening through the adapter being smaller than the inner end and connected with the latter by a tapering 130 section. p

4. The method of modifying the cap of a gas burner having an orifice for artificial gas through its end for use with natural gas which consists in increasing the size of the cap orifice to provide an opening for receiving the shank of a headed adapter havin an orifice therethrough of a size smaller t an the size of the artificial gas orifice originally in the end of the cap, inserting said adapter through said opening formed in the end of. the cap and securing the same in position with the head of the adapter against the end of the cap by expanding the inner end of the adapter toprovide a flange thereon within the cap, thereby converting the artificial gas orifice cap into a natural as orifice cap. r 5. The method of modifying the cap of a gas burner having an orifice for artificial. v gas through its end for use with natural gas which consists in increasing the size of the cap orifice to provide an opening for receiving the shank of a headed adapter having an orificetherethrough of a size smaller than the size of the artificialgas orifice originally in the end of the cap, inserting said adapter through said opening formed in the end of the cap and securing the same in position with the head of the adapter against the end 31? of the cap by expanding the inner end of the adapter to provide a flange thereon within the cap, and thereafter increasing the size of the orifice through the adapter if necessary to provide an orifice therethrough of the re- 35 quired size in accordance with the pressure of the gas in the locality where the burner is used, thereby converting the artificial gas orifice cap into a natural gas orifice capa In testimonywhereof we aflix our signa- 4 tures. I

OSCAR W. ANDERSON. EDWARD FORRESTER. 

